Sam and Dean are framed for a series of murder-robberies by two Leviathan that take the forms of the Winchester brothers. Bobby tries to figure out how to kill the Leviathan using the one they have hostage, while Sam and Dean take refuge with a surveillance expert, who gives them temporary identities to evade authorities. The brothers try to stop the two Leviathans and track them across the country,discovering that the Leviathan are committing the crimes in every town the brothers have visited since Sam left college. Meanwhile, Bobby continues to try and find a way to stop the Leviathan, finding that decapitation works. However, with the head in close proximity, it eventually re-attaches itself. The brothers eventually find the Leviathan in Iowa but are arrested by local law enforcement. Bobby gets a visit from Sheriff Jody Mills, who offers to clean up the cabin and cook some food for Bobby. While cleaning, however, some soapy water spills onto the Leviathan, causing serious burns. Bobby gives the hostage Leviathan's severed head to Jody, telling her to dump it. Soon after, Dean, given a phone call, contacts Bobby and manages to learn how to at least stall the Leviathan. The local sheriff eventually helps Sam and Dean when he sees the Leviathan eating one of the officers and turning into Sam and Dean. Sam, in an interrogation room, is confronted by the Leviathan Dean, who reveals Dean's killing of the kitsune, Amy. Dean and the sheriff manage to decapitate the Sam Leviathan, and then the Dean Leviathan shortly after, keeping the heads with them to prevent re-attachment. Afterward, however, Sam confronts Dean about Amy's death, telling him he can't talk to him right now, leaving Dean alone. Meanwhile, one of the Leviathan, disguised as an FBI agent, contacts his superior - a man named Dick Roman - about the recent failure. Crowley then appears to Dick in an effort to build a partnership, but Roman harshly turns Crowley down, considering demons to be even more pathetic than humans, and hinting that he wouldn't mind wiping them off the face of the Earth.